EP2866236B1 - Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques - Google Patents

Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques Download PDF

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Publication number
EP2866236B1
EP2866236B1 EP14189753.8A EP14189753A EP2866236B1 EP 2866236 B1 EP2866236 B1 EP 2866236B1 EP 14189753 A EP14189753 A EP 14189753A EP 2866236 B1 EP2866236 B1 EP 2866236B1
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EP
European Patent Office
Prior art keywords
wire
tension
rotation
winding
pushing
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EP14189753.8A
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German (de)
English (en)
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EP2866236A1 (fr
Inventor
Gian Battista Parati
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Marsilli and Co SpA
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Marsilli and Co SpA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
    • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
    • B65H59/18—Driven rotary elements
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
    • H01F41/04—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets for manufacturing coils
    • H01F41/06—Coil winding
    • H01F41/094—Tensioning or braking devices

Definitions

  • the present invention relates to a device for automatic wire tension adjustment during the various steps of winding in machines for winding electric coils.
  • the winding of coils for electrical or electromechanical components is performed generally by arranging the coils on spindles that are actuated so as to rotate the coils about their own axis and by feeding the wire to the coils so that it is progressively wound around them, although machines that perform winding by keeping the coils stationary and moving the wire around them also exist.
  • the wire is anchored, at the beginning and at the end of the winding, to pins provided on the coil, winding its ends around said pins.
  • wire tensioners which comprise generally a supporting structure provided with eyes and pulleys that define a path for the wire that arrives from a spool-magazine and, along said path, usually there is a brake, a load cell for detecting the tension of the wire, and a takeup arm, which can rotate, with respect to the supporting structure, about a corresponding axis and has the function of keeping the wire under tension, compensating for the different demand for wire by the elements that wind it around the coil or the pins.
  • the takeup arm is connected to springs that have the function of contrasting the rotation of the takeup arm when the demand for wire increases and to a damping element that has the function of damping the oscillations of the takeup arm about its own axis induced by the variations in the tension of the wire.
  • EP0926090A2 discloses a winding device and winding method in which a wire is fed from a spool which is rotated by a feeding motor.
  • the wire is led to a bobbin on the tip of a spindle via a pulley on the tip of a tension arm and a pulley fixed on a rotational axis of an encoder.
  • the rotational speed of the feeding motor is controlled depending on the winding speed of the wire onto the bobbin detected by the encoder.
  • Variations in the tension of the wire are detected by a potentiometer as rotations of the tension arm, and the rotational speed of the feeding motor is regulated depending on such variations in tension.
  • EP2031610A1 discloses a wire winding device which winds a wire around a core, with a roller feeding the wire to the core, and a tension device which adjusts the tension of the wire supplied to the core from the roller.
  • a speed detector detects the speed of the wire supplied to the core from the roller.
  • EP0424770A2 discloses a programmable self-adjusting device for tensioning wires during winding comprising, in the direction of advancement of a wire to be wound, a pre-braking device for tensioning the wire which winds on a brake pulley downstream of which there is a transmission roller which is supported by a compensating arm. At the exit from the transmission roller the wire engages a wire tension sensing unit which drives the brake pulley.
  • the aim of the present invention is to solve the problems described above, by providing a device for wire tension adjustment during the various steps of winding in machines for winding electric coils that allows to keep the tension of the wire substantially constant during the various steps of winding.
  • an object of the invention is to provide a device that allows to keep substantially constant the tension of the wire even during the steps of winding that cause accelerations and decelerations of the wire, such as for example in the transition from winding the wire around the pins to winding around the core of the coil and vice versa.
  • the device according to the invention generally designated by the reference numeral 1, comprises a supporting structure 2, which supports a series of elements that cooperate with each other in defining a path for the wire 3 that must be fed to the coil around which it is to be wound.
  • the device comprises, along the path of the wire 3, an element 4 for pushing and braking the wire 3 and comprises furthermore means 8 for detecting the rotation of the takeup arm 6 about the axis 7 with respect to the supporting structure 2, and the rotation detection means 8 are connected functionally to the pushing and braking element 4 for an automatic adjustment of the degree of thrust or braking applied to the wire 3 as a function of the detected value of the rotation of the takeup arm 6 about the axis 7.
  • the supporting structure 2 in the illustrated embodiment, is constituted by a box-like body 9, which supports, on one of its faces, a series of elements that are engaged by the wire 3 to be fed to the coil.
  • the pushing and braking element 4 comprises a pulley 10 on which the wire 3 is wound and a motor 11 which actuates the pulley 10 with a torque that can be varied and adjusted as a function of the tension of the wire 3 detected by the means 5 for detecting the tension of the wire 3 and/or as a function of the rotation of the takeup arm 6 detected by the rotation detection means 8, so as to maintain a preset tension of the wire 3 in a substantially constant manner.
  • the means 5 for detecting the tension of the wire 3 comprise a pair of pulleys 12, 13, which have mutually parallel axes and are engaged in sequence by the wire 3 that is fed to the coil and are connected, in a per se known manner, to a load cell 14, which detects constantly the tension applied to the wire 3.
  • the takeup arm 6 is connected to means for damping its rotation about the corresponding axis 7.
  • the takeup arm 6 is pivoted, about the axis 7, to the supporting structure 2 by means of an intermediate portion thereof.
  • a pulley 15 around which the wire 3 to be fed to the coil engages, while the other end of the takeup arm 6 engages against a lever 16, which also is pivoted to the supporting structure 2 about an axis 17 that is parallel to the axis 7.
  • the lever 16 connects the takeup arm 6 to the damping means, which are constituted by a damping element 18, of a known type, and elastic means act on the lever 16 and are constituted by springs 19, 20, which contrast the rotation of the takeup arm 6 about the axis 7 in the direction of rotation that would lead to a reduction of the path followed by the wire 3 along the device according to the invention.
  • the springs 19, 20 have the function of compensating for any slackening of the wire 3 during the operation of the device.
  • the damping element 18 is constituted by a damping element of the pneumatic type, but it might also be constituted by a damping element of a different type, for example of the electrical type, or another damping element of a known type.
  • the means 8 for detecting the rotation of the takeup arm 6 comprise an angular transducer 21, which is connected to the takeup arm 6.
  • the pulley 10 of the pushing and braking element 4 is arranged upstream of the takeup arm 6 along the advancement direction of the wire 3 during the winding of the coil.
  • the means 5 for detecting the tension of the wire 3 are arranged downstream of the takeup arm 6 along the advancement direction of the wire 3 during the winding of the coil.
  • the wire 3 to be wound which arrives from a spool-magazine, in input to the device, passes through an eye 22, then through a guiding element 23, then passes through a pair of cleaning felts 24a, 24b, passes through a passage 25 defined in the arm 26 that supports the pair of pulleys 12, 13, winds around the pulley 10 of the pushing and braking element 4, then engages a guiding pulley 27, winds around the pulley 15 of the takeup arm 6 and finally engages the pair of pulleys 12, 13 before it is conveyed to the spool around which it must be wound.
  • the pushing and braking element 4 and the means 5 for detecting the tension of the wire 3 are part of a first automatic adjustment loop with feedback for automatic adjustment of the degree of thrust or braking applied by the pushing or braking element 4 and therefore for an automatic adjustment of the tension of the wire 3 mainly in the steps for winding the coil at a substantially constant rotation rate thereof.
  • the means 8 for detecting the rotation of the takeup 6 arm are connected functionally to the pushing and braking element 4 by means of a system for automatic adjustment with feedback in order to vary the degree of thrust or braking applied to the wire 3 by the pushing and braking element 4 following the detection of a rotation of the takeup arm 6 about its own axis 7 with respect to the supporting structure 2.
  • the pushing and braking element 4 and the means 8 for detecting the rotation of the take up arm 6 are part of a second automatic adjustment loop with feedback of the tension of the wire 3 for automatic adjustment of the degree of thrust or braking applied to the wire 3 by the pushing and braking element 4 as a function of the detected value of the rotation of the takeup arm 6 about the axis 7 and therefore for automatic adjustment of the tension of the wire 3 mainly in the steps for winding the coil with a variable rotation rate thereof.
  • the oscillations of the takeup arm 6 about the axis 7 are substantially nil and the tension of the wire 3 is adjusted and kept substantially constant mainly by means of the first automatic adjustment loop with feedback, i.e., by means of the detection of the tension of the wire 3 performed by means of the load cell 14 and by means of an actuation of the pushing and braking element 4 as a function of the detected tension value with respect to the desired value.
  • the beginning of the oscillations is detected promptly by the angular transducer 21 and, by means of the second automatic adjustment loop with feedback, the thrust or braking action performed by the pushing and braking element 4 is changed automatically, by means of an adequate actuation of the pushing and braking element 4, as a function of the detection performed by the angular transducer 21.
  • the pushing and braking element 4 applies a pushing action to the wire 3, facilitating its advancements toward the coil being wound and thus returning the tension of the wire 3 to the desired value.
  • the device according to the invention achieves fully the intended aim, since it allows to maintain substantially constant the tension of the wire during the various steps of the winding of the coil, and in particular allows to keep substantially constant the tension of the wire even during the winding steps that require an acceleration and a deceleration of the rotation of the coil about its own axis.
  • the materials used, as well as the dimensions, may be any according to requirements and to the state of the art.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Coil Winding Methods And Apparatuses (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)

Claims (5)

  1. Dispositif pour réglage automatique de tension de fil pendant les diverses étapes d'enroulement dans des machines, destinées à enrouler des bobines électriques, comprenant une structure formant support (2), qui supporte une série d'éléments qui définissent une voie pour le fil (3) à amener à la bobine qui est enroulée ; le long de ladite voie, un moyen (5), destiné à détecter la tension du fil (3) et un bras d'appel (6), qui peut tourner autour d'un axe (7) par rapport à ladite structure formant support (2) en raison des variations de la tension du fil (3) y existant ; le long de ladite voie, un élément (4) de poussée et de freinage du fil (3) y existant et le dispositif comprenant en outre un moyen (8), destiné à détecter la rotation dudit bras d'appel (6) autour dudit axe (7) par rapport à ladite structure formant support (2), ledit moyen (8), destiné à détecter la rotation dudit bras d'appel (6), étant relié de manière fonctionnelle audit élément de poussée et de freinage (4), pour un réglage automatique du degré de poussée ou de freinage, appliqué au fil (3) en tant que fonction de la valeur détectée de la rotation dudit bras d'appel (6) autour dudit axe (7), ledit moyen (8), destiné à détecter la rotation dudit bras d'appel (6), étant relié de manière fonctionnelle audit élément de poussée et de freinage (4), au moyen d'un système de réglage automatique avec rétroaction, afin de faire varier le degré de poussée ou de freinage, appliqué au fil (3) par ledit élément de poussée et de freinage (4), à titre de conséquence de la détection d'une rotation dudit bras d'appel (6) autour de son propre axe (7) par rapport à ladite structure formant support (2), ledit élément de poussée et de freinage (4) et ledit moyen (5), destiné à détecter la tension du fil (3), faisant partie d'une première boucle de réglage automatique, avec rétroaction de la tension du fil (3), pour un réglage automatique du degré de poussée ou de freinage, appliqué au fil (3) par ledit élément de poussée et de freinage (4), en tant que fonction de la valeur détectée de la tension du fil (3) pendant une fréquence de rotation sensiblement constante d'enroulement du fil (3), ledit élément de poussée et de freinage (4) et ledit moyen (8), destiné à détecter la rotation dudit bras d'appel (6) faisant partie d'une seconde boucle de réglage automatique, avec rétroaction de la tension du fil (3), pour un réglage automatique du degré de poussée ou de freinage, appliqué au fil (3) par ledit élément de poussée et de freinage (4), en tant que fonction de la valeur détectée de la rotation dudit bras d'appel (6) autour de l'axe (7) correspondant, pendant une fréquence de rotation variable d'enroulement du fil (3) et ledit moyen (5), destiné à détecter la tension du fil (3), étant agencé en aval dudit bras d'appel (6), le long de la direction d'avancement du fil (3) pendant l'enroulement de la bobine.
  2. Dispositif selon la revendication 1, dans lequel ledit élément de poussée et de freinage (4) est agencé en amont dudit bras d'appel (6), le long de la direction d'avancement du fil (3), pendant l'enroulement de la bobine.
  3. Dispositif selon une ou plus des revendications précédentes, dans lequel ledit élément de poussée et de freinage (4) comprend une poulie (10), sur laquelle s'enroule le fil (3) et un moteur (11), qui entraîne ladite poulie (10) avec un couple qui peut varier, en tant que fonction de la tension du fil (3), détectée par ledit moyen (5), destiné à détecter la tension du fil (3) et / ou que fonction de la rotation dudit bras d'appel (6), détectée par ledit moyen (8), destiné à détecter la rotation dudit bras d'appel (6).
  4. Dispositif selon une ou plus des revendications précédentes, dans lequel ledit moyen (8), destiné à détecter la rotation dudit bras d'appel (6), comprend un transducteur angulaire (21).
  5. Dispositif selon une ou plus des revendications précédentes, dans lequel ledit bras d'appel (6) est relié à un moyen (18), destiné à amortir sa rotation autour de l'axe (7) correspondant.
EP14189753.8A 2013-10-22 2014-10-21 Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques Active EP2866236B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001761A ITMI20131761A1 (it) 2013-10-22 2013-10-22 Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.

Publications (2)

Publication Number Publication Date
EP2866236A1 EP2866236A1 (fr) 2015-04-29
EP2866236B1 true EP2866236B1 (fr) 2018-11-28

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EP14189753.8A Active EP2866236B1 (fr) 2013-10-22 2014-10-21 Dispositif pour réglages automatiques de tension de fil pendant les différentes étapes d'enroulement dans les machines pour enrouler des bobines électriques

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EP (1) EP2866236B1 (fr)
IT (1) ITMI20131761A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600127236A1 (it) * 2016-12-16 2018-06-16 Marsilli S P A Dispositivo per la regolazione automatica del tensionamento del filo durante le varie fasi di avvolgimento in macchine per l'avvolgimento di bobine elettriche.
JP6981766B2 (ja) * 2017-04-18 2021-12-17 Ｎｉｔｔｏｋｕ株式会社 テンション装置及びテンション制御方法
IT201800010099A1 (it) * 2018-11-07 2020-05-07 Marsilli S P A Macchina avvolgitrice, in particolare per l’avvolgimento di spire sui poli magnetici di statori, con gestione della tensione del filo perfezionata.

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752044A (en) 1986-08-16 1988-06-21 Gustav Memminger Yarn supply apparatus with electronic yarn tension control, particularly for knitting machines having rapidly varying yarn supply requirements
US4913374A (en) 1987-06-05 1990-04-03 Altic S.A.R.L. Paying out device
US5240194A (en) 1989-12-20 1993-08-31 Prosys S.A. Z.A.E. Findrol Apparatus for controlling the tension of a wire fed to a winding machine
JPH06310353A (ja) 1993-04-27 1994-11-04 Murata Mfg Co Ltd 巻線機におけるテンション付与機構及びテンション制御方法
WO2005111287A1 (fr) 2004-05-14 2005-11-24 Corsani Simonetta Dispositif d'alimentation en fil
JP2006225051A (ja) 2005-02-15 2006-08-31 Nittoku Eng Co Ltd テンション監視装置
WO2009112221A1 (fr) 2008-03-11 2009-09-17 B.T.S.R. International S.P.A. Dispositif et procédé d’avance en tension constante de fils ou filasses alimentés de façon discontinue
EP2773583A1 (fr) 2011-11-02 2014-09-10 BTSR International S.P.A. Dispositif d'acheminement positif pour acheminer des fils métalliques à une tension constante

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1237491B (it) * 1989-10-25 1993-06-08 Gian Battista Parati Dispositivo autoregolante programmabile per il tensionamento di fili durante la bobinatura
JPH11222357A (ja) * 1997-12-05 1999-08-17 Nittoku Eng Co Ltd 巻線装置および巻線方法
CN101454850B (zh) * 2006-05-26 2011-08-31 日特机械工程株式会社 绕线装置、张紧装置以及绕线方法
JP5894444B2 (ja) * 2012-01-20 2016-03-30 日特エンジニアリング株式会社 テンション装置及びテンション付与方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4752044A (en) 1986-08-16 1988-06-21 Gustav Memminger Yarn supply apparatus with electronic yarn tension control, particularly for knitting machines having rapidly varying yarn supply requirements
US4913374A (en) 1987-06-05 1990-04-03 Altic S.A.R.L. Paying out device
US5240194A (en) 1989-12-20 1993-08-31 Prosys S.A. Z.A.E. Findrol Apparatus for controlling the tension of a wire fed to a winding machine
JPH06310353A (ja) 1993-04-27 1994-11-04 Murata Mfg Co Ltd 巻線機におけるテンション付与機構及びテンション制御方法
WO2005111287A1 (fr) 2004-05-14 2005-11-24 Corsani Simonetta Dispositif d'alimentation en fil
JP2006225051A (ja) 2005-02-15 2006-08-31 Nittoku Eng Co Ltd テンション監視装置
WO2009112221A1 (fr) 2008-03-11 2009-09-17 B.T.S.R. International S.P.A. Dispositif et procédé d’avance en tension constante de fils ou filasses alimentés de façon discontinue
EP2773583A1 (fr) 2011-11-02 2014-09-10 BTSR International S.P.A. Dispositif d'acheminement positif pour acheminer des fils métalliques à une tension constante

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Publication number Publication date
EP2866236A1 (fr) 2015-04-29
ITMI20131761A1 (it) 2015-04-23

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